氯化物发生-电感耦合等离子体发射光谱法测定含锗保健品中无机锗  

Determination of Inorganic Germanium in Health Foods by Inductively Coupled Plasma Optical Emission Spectrometry with Chloride Generation

作　　者：徐臻荣 马晓玲 贾晓宇[3,4] 韩熠[3,4] 段太成[3] 陈杭亭[3] 

机构地区：[1]上海市食品生产监督所,上海201800 [2]上海屹尧仪器科技发展有限公司,上海201108 [3]中国科学院长春应用化学研究所电分析国家重点实验室,长春130022 [4]中国科学院研究生院,北京100039

出　　处：《分析化学》2011年第4期548-551,共4页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金项目(Nos.20605021;20975099);"十一五"国家科技支撑计划项目(No.2009ZX09308-006-5)资助

摘　　要：基于电感耦合等离子体发射光谱（ICP-OES）法研究了无机锗和有机锗在HCl介质中的氯化物发生情况。结果表明,有机锗（Ge-132）不形成氯化物,而无机锗在以浓HCl为载流,载气压力0.14 MPa,样品溶液中HCl浓度为6 mol/L时能实现最佳的氯化物发生效率,由此建立了含锗保健品提取液中无机锗的选择性测定新方法。方法的线性范围为2~500 mg/L,线性相关系数为0.9997,检出限达到0.6 mg/L。10次平行测定10和100 mg/L无机锗标准溶液的RSD分别为4.9%和0.9%。样品加入两个浓度水平（10和100 mg/L）无机锗标准溶液的回收率为83%~97%,表明共存有机和无机基体组分不存在明显干扰。Inductively coupled plasma optical emission spectrometry （ICP-OES） combined with chloride generation was used for the determination of inorganic germanium（InGe） in the health foods. In this study, 12 mol/L HCl was used as the carrier solution, the concentration of HCl in sample solution was 6 mol/L, and the＇ pressure of the nebulizer gas as the carrier for the volatile GeCl4 was set at 0.14 MPa. The results showed that the linear range for InGe detection was 2--500 μg/L, with a correlation coefficient of 0. 9997, and the detection limit（3σ） of 0.6 μg/L was obtained. The detection precision（RSD） for 10 measurements of 10 μg/L InGe was 4. 9%, and for 100 μg/L InGe was 0.9%. The mean recovery of real sample analysis ranged from 83% to 97% for spiked 10 and 100μg/L of InGe.

关 键 词：氯化物发生 电感耦合等离子体发射光谱 无机锗 

分 类 号：TS218[轻工技术与工程—粮食、油脂及植物蛋白工程]